devices/bsim4v5, implement BSIM4v5soaCheck()

src/spicelib/devices/bsim4v5/Makefile.am

@@ -20,6 +20,7 @@ libbsim4v5_la_SOURCES =	\
 	b4v5par.c	\
 	b4v5pzld.c	\
 	b4v5set.c	\
+	b4v5soachk.c	\
 	b4v5temp.c	\
 	b4v5trunc.c	\
 	bsim4v5def.h	\

src/spicelib/devices/bsim4v5/b4v5.c

@@ -890,6 +890,13 @@ IOP( "ef", BSIM4v5_MOD_EF, IF_REAL, "Flicker noise frequency exponent"),
 IOP( "af", BSIM4v5_MOD_AF, IF_REAL, "Flicker noise exponent"),
 IOP( "kf", BSIM4v5_MOD_KF, IF_REAL, "Flicker noise coefficient"),
 
+IOP("vgs_max", BSIM4v5_MOD_VGS_MAX, IF_REAL, "maximum voltage G-S branch"),
+IOP("vgd_max", BSIM4v5_MOD_VGD_MAX, IF_REAL, "maximum voltage G-D branch"),
+IOP("vgb_max", BSIM4v5_MOD_VGB_MAX, IF_REAL, "maximum voltage G-B branch"),
+IOP("vds_max", BSIM4v5_MOD_VDS_MAX, IF_REAL, "maximum voltage D-S branch"),
+IOP("vbs_max", BSIM4v5_MOD_VBS_MAX, IF_REAL, "maximum voltage B-S branch"),
+IOP("vbd_max", BSIM4v5_MOD_VBD_MAX, IF_REAL, "maximum voltage B-D branch"),
+
 IP( "nmos", BSIM4v5_MOD_NMOS,  IF_FLAG, "Flag to indicate NMOS"),
 IP( "pmos", BSIM4v5_MOD_PMOS,  IF_FLAG, "Flag to indicate PMOS"),
 };

src/spicelib/devices/bsim4v5/b4v5mask.c

@@ -2253,6 +2253,26 @@ IFvalue *value)
         case BSIM4v5_MOD_KF:
             value->rValue = model->BSIM4v5kf;
             return(OK);
+
+        case BSIM4v5_MOD_VGS_MAX:
+            value->rValue = model->BSIM4v5vgsMax;
+            return(OK);
+        case BSIM4v5_MOD_VGD_MAX:
+            value->rValue = model->BSIM4v5vgdMax;
+            return(OK);
+        case BSIM4v5_MOD_VGB_MAX:
+            value->rValue = model->BSIM4v5vgbMax;
+            return(OK);
+        case BSIM4v5_MOD_VDS_MAX:
+            value->rValue = model->BSIM4v5vdsMax;
+            return(OK);
+        case BSIM4v5_MOD_VBS_MAX:
+            value->rValue = model->BSIM4v5vbsMax;
+            return(OK);
+        case BSIM4v5_MOD_VBD_MAX:
+            value->rValue = model->BSIM4v5vbdMax;
+            return(OK);
+
         default:
             return(E_BADPARM);
     }

src/spicelib/devices/bsim4v5/b4v5mpar.c

@@ -3060,6 +3060,32 @@ GENmodel *inMod)
             mod->BSIM4v5kf = value->rValue;
             mod->BSIM4v5kfGiven = TRUE;
             break;
+
+        case BSIM4v5_MOD_VGS_MAX:
+            mod->BSIM4v5vgsMax = value->rValue;
+            mod->BSIM4v5vgsMaxGiven = TRUE;
+            break;
+        case BSIM4v5_MOD_VGD_MAX:
+            mod->BSIM4v5vgdMax = value->rValue;
+            mod->BSIM4v5vgdMaxGiven = TRUE;
+            break;
+        case BSIM4v5_MOD_VGB_MAX:
+            mod->BSIM4v5vgbMax = value->rValue;
+            mod->BSIM4v5vgbMaxGiven = TRUE;
+            break;
+        case BSIM4v5_MOD_VDS_MAX:
+            mod->BSIM4v5vdsMax = value->rValue;
+            mod->BSIM4v5vdsMaxGiven = TRUE;
+            break;
+        case BSIM4v5_MOD_VBS_MAX:
+            mod->BSIM4v5vbsMax = value->rValue;
+            mod->BSIM4v5vbsMaxGiven = TRUE;
+            break;
+        case BSIM4v5_MOD_VBD_MAX:
+            mod->BSIM4v5vbdMax = value->rValue;
+            mod->BSIM4v5vbdMaxGiven = TRUE;
+            break;
+
         case  BSIM4v5_MOD_NMOS  :
             if(value->iValue) {
                 mod->BSIM4v5type = 1;

src/spicelib/devices/bsim4v5/b4v5set.c

@@ -1567,6 +1567,19 @@ JOB   *job;
         if (!model->BSIM4v5kfGiven)
             model->BSIM4v5kf = 0.0;
 
+        if (!model->BSIM4v5vgsMaxGiven)
+            model->BSIM4v5vgsMax = 1e99;
+        if (!model->BSIM4v5vgdMaxGiven)
+            model->BSIM4v5vgdMax = 1e99;
+        if (!model->BSIM4v5vgbMaxGiven)
+            model->BSIM4v5vgbMax = 1e99;
+        if (!model->BSIM4v5vdsMaxGiven)
+            model->BSIM4v5vdsMax = 1e99;
+        if (!model->BSIM4v5vbsMaxGiven)
+            model->BSIM4v5vbsMax = 1e99;
+        if (!model->BSIM4v5vbdMaxGiven)
+            model->BSIM4v5vbdMax = 1e99;
+
         /* stress effect */
         if (!model->BSIM4v5sarefGiven)
             model->BSIM4v5saref = 1e-6; /* m */

src/spicelib/devices/bsim4v5/b4v5soachk.c

@@ -0,0 +1,110 @@
+/**********
+Copyright 2013 Dietmar Warning. All rights reserved.
+Author:   2013 Dietmar Warning
+**********/
+
+#include "ngspice/ngspice.h"
+#include "ngspice/cktdefs.h"
+#include "bsim4v5def.h"
+#include "ngspice/trandefs.h"
+#include "ngspice/sperror.h"
+#include "ngspice/suffix.h"
+#include "ngspice/cpdefs.h"
+
+
+int
+BSIM4v5soaCheck(CKTcircuit *ckt, GENmodel *inModel)
+{
+    BSIM4v5model *model = (BSIM4v5model *) inModel;
+    BSIM4v5instance *here;
+    double vgs, vgd, vgb, vds, vbs, vbd;    /* actual mos voltages */
+    int maxwarns;
+    static int warns_vgs = 0, warns_vgd = 0, warns_vgb = 0, warns_vds = 0, warns_vbs = 0, warns_vbd = 0;
+
+    if (!ckt) {
+        warns_vgs = 0;
+        warns_vgd = 0;
+        warns_vgb = 0;
+        warns_vds = 0;
+        warns_vbs = 0;
+        warns_vbd = 0;
+        return OK;
+    }
+
+    maxwarns = ckt->CKTsoaMaxWarns;
+
+    for (; model; model = model->BSIM4v5nextModel) {
+
+        for (here = model->BSIM4v5instances; here; here = here->BSIM4v5nextInstance) {
+
+            vgs = fabs(ckt->CKTrhsOld [here->BSIM4v5gNodePrime] -
+                       ckt->CKTrhsOld [here->BSIM4v5sNodePrime]);
+
+            vgd = fabs(ckt->CKTrhsOld [here->BSIM4v5gNodePrime] -
+                       ckt->CKTrhsOld [here->BSIM4v5dNodePrime]);
+
+            vgb = fabs(ckt->CKTrhsOld [here->BSIM4v5gNodePrime] -
+                       ckt->CKTrhsOld [here->BSIM4v5bNodePrime]);
+
+            vds = fabs(ckt->CKTrhsOld [here->BSIM4v5dNodePrime] -
+                       ckt->CKTrhsOld [here->BSIM4v5sNodePrime]);
+
+            vbs = fabs(ckt->CKTrhsOld [here->BSIM4v5bNodePrime] -
+                       ckt->CKTrhsOld [here->BSIM4v5sNodePrime]);
+
+            vbd = fabs(ckt->CKTrhsOld [here->BSIM4v5bNodePrime] -
+                       ckt->CKTrhsOld [here->BSIM4v5dNodePrime]);
+
+            if (vgs > model->BSIM4v5vgsMax)
+                if (warns_vgs < maxwarns) {
+                    soa_printf(ckt, (GENinstance*) here,
+                               "|Vgs|=%g has exceeded Vgs_max=%g\n",
+                               vgs, model->BSIM4v5vgsMax);
+                    warns_vgs++;
+                }
+
+            if (vgd > model->BSIM4v5vgdMax)
+                if (warns_vgd < maxwarns) {
+                    soa_printf(ckt, (GENinstance*) here,
+                               "|Vgd|=%g has exceeded Vgd_max=%g\n",
+                               vgd, model->BSIM4v5vgdMax);
+                    warns_vgd++;
+                }
+
+            if (vgb > model->BSIM4v5vgbMax)
+                if (warns_vgb < maxwarns) {
+                    soa_printf(ckt, (GENinstance*) here,
+                               "|Vgb|=%g has exceeded Vgb_max=%g\n",
+                               vgb, model->BSIM4v5vgbMax);
+                    warns_vgb++;
+                }
+
+            if (vds > model->BSIM4v5vdsMax)
+                if (warns_vds < maxwarns) {
+                    soa_printf(ckt, (GENinstance*) here,
+                               "|Vds|=%g has exceeded Vds_max=%g\n",
+                               vds, model->BSIM4v5vdsMax);
+                    warns_vds++;
+                }
+
+            if (vbs > model->BSIM4v5vbsMax)
+                if (warns_vbs < maxwarns) {
+                    soa_printf(ckt, (GENinstance*) here,
+                               "|Vbs|=%g has exceeded Vbs_max=%g\n",
+                               vbs, model->BSIM4v5vbsMax);
+                    warns_vbs++;
+                }
+
+            if (vbd > model->BSIM4v5vbdMax)
+                if (warns_vbd < maxwarns) {
+                    soa_printf(ckt, (GENinstance*) here,
+                               "|Vbd|=%g has exceeded Vbd_max=%g\n",
+                               vbd, model->BSIM4v5vbdMax);
+                    warns_vbd++;
+                }
+
+        }
+    }
+
+    return OK;
+}

src/spicelib/devices/bsim4v5/bsim4v5def.h

@@ -1470,6 +1470,13 @@ typedef struct sBSIM4v5model
     double BSIM4v5af;  
     double BSIM4v5kf;  
 
+    double BSIM4v5vgsMax;
+    double BSIM4v5vgdMax;
+    double BSIM4v5vgbMax;
+    double BSIM4v5vdsMax;
+    double BSIM4v5vbsMax;
+    double BSIM4v5vbdMax;
+
     struct bsim4v5SizeDependParam *pSizeDependParamKnot;
 
     /* Flags */
@@ -2192,6 +2199,13 @@ typedef struct sBSIM4v5model
     unsigned  BSIM4v5afGiven  :1;     
     unsigned  BSIM4v5kfGiven  :1;     
 
+    unsigned  BSIM4v5vgsMaxGiven  :1;
+    unsigned  BSIM4v5vgdMaxGiven  :1;
+    unsigned  BSIM4v5vgbMaxGiven  :1;
+    unsigned  BSIM4v5vdsMaxGiven  :1;
+    unsigned  BSIM4v5vbsMaxGiven  :1;
+    unsigned  BSIM4v5vbdMaxGiven  :1;
+
     unsigned  BSIM4v5LintGiven   :1;
     unsigned  BSIM4v5LlGiven   :1;
     unsigned  BSIM4v5LlcGiven   :1;
@@ -3164,6 +3178,13 @@ typedef struct sBSIM4v5model
 #define BSIM4v5_MOD_RBSDBYW             1125
 #define BSIM4v5_MOD_RBSDBYNF            1126
 
+#define BSIM4v5_MOD_VGS_MAX            1201
+#define BSIM4v5_MOD_VGD_MAX            1202
+#define BSIM4v5_MOD_VGB_MAX            1203
+#define BSIM4v5_MOD_VDS_MAX            1204
+#define BSIM4v5_MOD_VBS_MAX            1205
+#define BSIM4v5_MOD_VBD_MAX            1206
+
 #include "bsim4v5ext.h"
 
 extern void BSIM4v5evaluate(double,double,double,BSIM4v5instance*,BSIM4v5model*,

src/spicelib/devices/bsim4v5/bsim4v5ext.h

@@ -28,3 +28,4 @@ extern int BSIM4v5temp(GENmodel*,CKTcircuit*);
 extern int BSIM4v5trunc(GENmodel*,CKTcircuit*,double*);
 extern int BSIM4v5noise(int,int,GENmodel*,CKTcircuit*,Ndata*,double*);
 extern int BSIM4v5unsetup(GENmodel*,CKTcircuit*);
+extern int BSIM4v5soaCheck(CKTcircuit *, GENmodel *);

src/spicelib/devices/bsim4v5/bsim4v5init.c

@@ -67,7 +67,7 @@ SPICEdev BSIM4v5info = {
     NULL,          /* DEVsenTrunc    */
     NULL,          /* DEVdisto       */
     BSIM4v5noise,    /* DEVnoise       */
-    NULL,            /* DEVsoaCheck    */
+    BSIM4v5soaCheck, /* DEVsoaCheck    */
 #ifdef CIDER
     NULL,          /* DEVdump        */
     NULL,          /* DEVacct        */

visualc/vngspice.vcproj

@@ -4216,6 +4216,10 @@
 				RelativePath="..\src\spicelib\devices\bsim4v5\b4v5set.c"
 				>
 			</File>
+			<File
+				RelativePath="..\src\spicelib\devices\bsim4v5\b4v5soachk.c"
+				>
+			</File>
 			<File
 				RelativePath="..\src\spicelib\devices\bsim4v5\b4v5temp.c"
 				>